Recyclable single polymer floorcovering article

Patent metadata

Field	Value
Publication number	US-11673291-B2
Application number	US-202117353941-A
Country	US
Kind code	B2
Filing date	Jun 22, 2021
Priority date	Mar 12, 2013
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

This invention relates to tufted floorcovering articles, including carpet tiles and broadloom carpet. In particular, this invention relates to tufted floorcovering articles made from the family of polymers known as polyester. Specifically, this invention relates to tufted carpet tile products made from polyester. The polyester carpet tiles meet commercial performance specifications and are fully end-of-life recyclable.

First claim

What is claimed is:

1. A process for recycling a polyester floorcovering article comprising the steps of:
(a) providing a floorcovering article comprised of substantially 100% polyester material, wherein the 100% polyester material includes a plurality of face yarns tufted into a primary backing fabric held in place by an adhesive layer that further adheres a secondary backing to the floorcovering article;
(b) shredding the floorcovering article;
(c) feeding the floorcovering article into a plast agglomerator;
(d) heating the floorcovering article by friction to just below the melting temperature of the article;
(e) forcing the floorcovering article of step “d” through a die;
cutting the floorcovering article of step “e” into granules with a high bulk density; and
(g) using the granules as a feedstock for other processes to make polyester articles.

2. A process for recycling a polyester floorcovering article comprising the steps of:
(a) providing a floorcovering article comprised of substantially 100% polyester material, wherein the 100% polyester material includes a plurality of face yarns tufted into a primary backing fabric held in place by an adhesive layer that further adheres a secondary backing to the floorcovering article;
(b) marking the floorcovering article with a resin identification code according to ASTM D7611/D7611M;
(c) placing the floorcovering article in a recycle bin according to the resin identification code present on the floorcovering article; and
(d) allowing the floorcovering article to be recycled for use in new products.

Assignees

• Milliken & Co

Inventors

• Williams Dale R
• Wallen Joseph
• Dawson Ty Grant
• Sellman Jr Nils David
• Mcbride Daniel Taylor
• Royer Joseph R
• Sanchez John L

Classifications

• B29K2105/26

  Scrap {or recycled material} · CPC title

• A47G27/02 Primary

  Carpets; Stair runners; Bedside rugs; Foot mats (mat-like foot scrapers A47L23/22 {; doormats A47L23/26}) · CPC title

• Y10T428/23979

  Particular backing structure or composition · CPC title

• B29K2067/00

  Use of polyesters {or derivatives thereof}, as moulding material · CPC title

• D06N7/0076

  the back coating or pre-coat being a thermoplastic material applied by, e.g. extrusion coating, powder coating or laminating a thermoplastic film · CPC title